RT Journal Article
SR Electronic
T1 Genome elimination mediated by gene expression from a selfish chromosome
JF Science Advances
JO Sci Adv
FD American Association for the Advancement of Science
SP eaaz9808
DO 10.1126/sciadv.aaz9808
VO 6
IS 14
A1 Dalla Benetta, Elena
A1 Antoshechkin, Igor
A1 Yang, Ting
A1 Nguyen, Hoa Quang My
A1 Ferree, Patrick M.
A1 Akbari, Omar S.
YR 2020
UL http://advances.sciencemag.org/content/6/14/eaaz9808.abstract
AB Numerous plants and animals harbor selfish B chromosomes that “drive” or transmit themselves at super-Mendelian frequencies, despite long-term fitness costs to the organism. Currently, it is unknown how B chromosome drive is mediated, and whether B-gene expression plays a role. We used modern sequencing technologies to analyze the fine-scale sequence composition and expression of paternal sex ratio (PSR), a B chromosome in the jewel wasp Nasonia vitripennis. PSR causes female-to-male conversion by destroying the sperm’s hereditary material in young embryos to drive. Using RNA interference, we demonstrate that testis-specific expression of a PSR-linked gene, named haploidizer, facilitates this genome elimination–and–sex conversion effect. haploidizer encodes a putative protein with a DNA binding domain, suggesting a functional link with the sperm-derived chromatin.